When they broke up is not known, but after their breakup, it was revealed they wrote songs about each other.

Though they split under not-so-good circumstances, they continue to remain the best of friends.

Lovato has even toured with Nick and Joe who are now solo acts.

Fans found evidence of their breakup the same way they did about their relationship, on Twitter.

This is where the “complicated” dating history officially starts.After her rehab stint, Lovatics were ecstatic to know that the 24-year-old was getting back in the game.In 2010, she announced her relationship with That 70s Show star, Wilmer Valderrama.The couple has since displayed their love on Instagram with some cuddly posts, and she cheered for him when he won one of his big fights.The songstress was even spotted with a ring, sparking engagement rumors, but that quickly died down.I really wouldn’t be alive today without him,” she wrote.